Lappi, M. (2019). Los fósiles. Smartbook Media Inc.
https://learn.openlightbox.com/TASubscription/92fe5023-7012-4c62-a2bf-77a2d5dd0963/9081e918-aca7-4d85-8f61-2ac49ebd27ee/5/134
The Chicago Manual of Style (Chicago)
Lappi, Megan. Los fósiles. La geología. New York: Smartbook Media Inc., 2019,
https://learn.openlightbox.com/TASubscription/92fe5023-7012-4c62-a2bf-77a2d5dd0963/9081e918-aca7-4d85-8f61-2ac49ebd27ee/5/134. Accessed
28 Jun. 2025.
The Modern Language Association of America (MLA)
Lappi, Megan. Los fósiles. Smartbook Media Inc., 2019. La geología. Lightbox Spanish Subscription,
https://learn.openlightbox.com/TASubscription/92fe5023-7012-4c62-a2bf-77a2d5dd0963/9081e918-aca7-4d85-8f61-2ac49ebd27ee/5/134.
